JPS58191056A - Load survey device - Google Patents

Abstract

PURPOSE:To decrease the data collecting time when only a partial region of a semiconductor memory is used in a short period of measurement, by collecting only the effective measurement data within a semiconductor memory to a magnetic cassette tape. CONSTITUTION:The measuring pulse fed from a detector 201 connected to a measuring device like a watthour meter, etc. is counted and then stored for each fixed time to a semiconductor memory 204 by a load measuring device 2. In addition to this device 2, a data recorder 3 is added to record and collect the data of the memory 204 to a cassette tape 4. The device 2 is provided with a measuring counter 203 which counts the measuring pulses, the memory 204 which stores the measured data, a clock circuit 206 which decide the time when the measured value of the counter 203 is written to the memory 204, a control circuit 202 which produces data writing/reading control signals for the memory 204, an input/output circuit 205 which performs input/output of data to the recorder 3, and a power supply circuit 2 for the device 2.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a road survey device that uses electricity, gas,
Measure and record the amount of water used, etc. at regular intervals, calculate the measured data with a computer, and investigate and investigate the usage status.
The present invention relates to a road survey device suitable for analysis.

[Technical background of the invention]

FIG. 1 shows a perspective view of a conventional load survey device used for an electric power load survey. The load survey device shown in FIG. 1 is a system for investigating the actual state of electric power load on a customer-by-consumer basis.

As shown in Figure 1, this system installs an electric power load measuring device for each watt-hour meter, measures the amount of electric power used per 1S minute, and measures the amount of electric power used in six directions. It is stored in semiconductor memory that is not used. Then, every month, the meter reader records the measurement data stored in the semiconductor memory inside the electric power load measuring device on a cassette tape using the data recorder 3 along with the device number of the electric power load measuring device 2. to recover. The measurement data collected by the cassette tape μ is appropriately processed by a computer, and is used for the analysis of survey 1, such as changes in the amount of electricity used by each customer.

In such a system, the power load measuring device has a built-in semiconductor memory of a certain capacity, and when storing measurement data, the measurement data is sequentially stored at fixed time intervals starting from address Q of the semiconductor memory. Write and record. On the other hand, when data is collected by the data recorder 3, a specific code indicating an unrecorded portion is written in the portion of the semiconductor memory where measurement data is not written, and then the semiconductor memory in the power load measuring device 2 is Record all data on cassette tape and collect it. Therefore, weighing data and data indicating unrecorded portions are recorded on the cassette Qi-Go. and,
When performing arithmetic processing on a computer, the data was used after separating the measurement data from a specific code indicating the unrecorded portion.

On the other hand, since recent load measuring instruments are intended for long-term measurement and measurement of a plurality of measured values, the capacity of built-in semiconductor memory is increasing. On the other hand, it is also used for a variety of purposes, and is often used for short-term measurements or measurements with a small number of samples.

[Problems with background technology]

For this reason, with the conventional method of recording all the data in the semiconductor memory on a cassette tape, the load measuring device 2 is used for short-term measurements or measurements with a small number of samples, and only a portion of the semiconductor memory is used. Even in cases where the data collection time and the number of data that can be stored in one volume of a cassette tape≠ are determined by the capacity of the semiconductor memory in the load measuring device do not have.

Therefore, if a load measuring device with a large capacity semiconductor memory for long-term measurements is used for short-term measurements, the data collection time will be longer and the number of effective data items that can be stored in the first volume will be longer. This has been an obstacle to efficient data collection.

[Purpose of the invention]

Therefore, an object of the present invention is to magnetically store data in a semiconductor memory in a load measuring device using a data recorder.

By collecting only valid measurement data in the semiconductor memory onto a magnetic cassette tape, it is possible to collect data when the measurement period is short and only a part of the semiconductor memory is used. To provide a load survey device capable of shortening the time and increasing the number of data items stored in seven tapes.

[Summary of the invention]

In order to achieve the above object, the present invention V is provided.

A road survey device includes a semiconductor memory that stores data from a detector at regular intervals, a means for recording a percentage code at an unrecorded address before reading data from the semiconductor memory, and a means for reading data from the semiconductor memory. and means for stopping recording on the recording medium when a specific code is read out from the semiconductor memory.

[Embodiments of the invention]

FIG. 1 is a block diagram of a road survey apparatus according to an embodiment of the present invention. The system shown in the figure includes a load measuring device λ that counts measurement pulses from a detector 20/ connected to a measuring device such as a watt-hour meter, and stores the measurement pulses in a semiconductor memory λ bowl at regular intervals, and a semiconductor memory 2 words of data on cassette tape≠
It consists of a data recorder 3 for recording and collecting data. The load measuring device 2 includes a weighing counter 203 for counting weighing pulses and a semiconductor memory g for storing weighing data.
w, a clock circuit 206 that determines the time to write the count value of the weighing counter 203 to the semiconductor memory controller 0≠, and a control circuit 202 that generates control signals for writing and reading data to and from the semiconductor memory 10. It is comprised of an input/output circuit λOS that inputs and outputs data to and from the data recorder 3, and a power supply circuit 207 that provides power for the load measuring device λ. On the other hand, the data recorder 3 has an input/output circuit 3 (H1) that inputs and outputs data to and from the load measuring device λ (a cassette tape operating circuit 30 that records the input weighing data onto a magnetic cassette tape).
, input/output circuit 301 and cassette tape operation circuit 30
OPU (central processing circuit) 3//,
c ROM (IJ-on memory) 3/≠ that contains a program for controlling the P U 3ii, an operation display circuit 3/λ that displays the operating status of the data recorder 3, etc.;
It is composed of a power supply circuit 313 and the like that supplies power to the data recorder 3.

In this configuration, the load measuring device 203 counts pulse signals from the detector 101, which outputs pulses proportional to the usage amount of gas, water, etc., using the metering counter 203. The control circuit 20λ stores the contents of the weighing counter X)3 in the semiconductor memory 2otlLtcI@next at regular time intervals in response to a signal from the blackout circuit 20t.

On the other hand, at the time of data collection, a start signal from the data recorder 3 causes the control circuit 20-
writes the % constant code to the unstored part of the measurement data in the semiconductor memory λQ≠.Then, the load measuring device writes the semiconductor memory OP by the strobe signal from the data recorder 3.
A circuit that sequentially outputs the contents of −〇! Through data recorder 3
The data recorder 3 inputs measurement data transmitted from the load measuring device through the input circuit 301. ROM 3/II has a built-in program that determines whether the data input to a part of it is a code indicating an unrecorded portion, and this program determines whether 0PU3// is a code indicating an unrecorded portion. Until this code is input, data is primarily input and sent to the cassette tape operation circuit 30. The cassette tape operation circuit 30 sequentially records the received measurement data onto the cassette tape.

Then, when a code indicating an unrecorded portion is input, data input from the load measuring device 2 is stopped, a display indicating the end of data collection is displayed on the operation display section 3, and the data collection operation is ended.

To give a more specific example, if we express the data of the load measuring device in r bits (l bytes), it will be expressed in 74 decimal notation.
Let be the code indicating the unrecorded part.

It is also assumed that the load measuring device λ has a built-in semiconductor memory of 6 bytes aO. The load measuring device measures the weighing counter at regular intervals from address 0 of the semiconductor memory 20≠.
Write the contents of 203. Semiconductor memory 204 in this case
The state of A is shown in the memory map of FIG. Now, it is assumed that the data recorder 3 performs a data collection operation after the measurement data has been written up to the roo address of the semiconductor memory card 01. In this case, the load measuring device writes the code 11 indicating the unrecorded portion from address jO/ to the final address ≠02j in response to the start signal from the data recorder 3, and then K.

The data recorder 3 is a semiconductor memory λO in the load measuring device λ.
Input primary data from address O of ≠. The data recorder 3 continues to input data and record it on the cassette tape μ until the code 'FF' is input while determining whether or not the input data is a code 'FF'.
When FF〃 is input, recording of the weighing data on the cassette tape≠ is completed.

Therefore, in the conventional method, all the contents from address O to Hiro 02 address are recorded on a cassette tape, and at the stage of arithmetic processing in a computer, the weighing data shown in Fig. 3 and a code indicating the unrecorded portion are recorded on a cassette tape. In the above example, the cassette tape/top 8'ζ is
According to the device of this embodiment, the recording space for bytes was required, but the recording space for θ0 bytes is now required, and therefore the cassette tape can be used efficiently, and the data collection time is also shortened. be able to. Furthermore, since the data collection time is short, when considering that the data recorder 3 is mostly powered by batteries, another effect is that battery consumption can be significantly reduced.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to shorten the collection time of measurement data, and also to increase the efficiency of using the data storage recording medium 1, such as a cassette tape, thereby achieving a load with excellent overall efficiency. You can get survey equipment.

[Brief explanation of drawings]

FIG. 7 is a perspective view showing a case where a conventional load survey device is used for an electric power load survey. 2 are block diagrams of a road survey apparatus according to an embodiment of the present invention, and FIG. 3 is a memory map for explaining the operation of the apparatus shown in FIG. K...Load measuring device, 3...Data recorder, D...
·cassette tape,! ...Calculator, Ko03...Measuring counter, 204L...Semiconductor memory, λ02...
Control circuit, 30ri...Cassette tape operation circuit, 3
//...CPU (central processing circuit), 3/4/L...
ROM (read-on memory).

Claims (1)

[Scope of Claims] (1) A semiconductor memory that stores data from a detector at fixed time intervals, and means that reads out data from the semiconductor memory and records a specific code at an address where no data is recorded. , a road survey characterized by comprising means for reading data from a semiconductor memory and recording it on another recording medium, and means for stopping recording on the recording medium at a point in time when a specific code is read from the semiconductor memory. Device. (g) The road survey apparatus according to claim 1, wherein the recording medium is a magnetic tape. (3) The road survey device according to claim 7, wherein the semiconductor memory is installed at the same position as the detector, and the system including the recording medium is configured to be movable.